code: def test_graph_conv_float64(self):
      paddle.set_default_dtype("float64")
      self.run_graph_conv("float64")
  
file_path: PGL/tests/test_conv.py
imports: import unittest
  import numpy
  import paddle
  import pgl
label_desc: Use image node_id 3 for calling the ConvTest obj's underlying member method code with example usage: obj.test_graph_conv_float64() without return types